Creating Drag and Drop from a tree view

Creating Drag and Drop from a tree view

Is it possible to drag a tree node onto a chart?

I cant get the drop zone to work properly. I see that my treePanel is correctly dragging the node, but I cant get the drop to work. Am I missing something? Also I am using sencha architect and I do not see anything in the toolbox for drop zones.... My chart is in a panel, and on render, I run this function...